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  1. The embargo period before an article is made available for free can vary from a few months to two or more years. In a 2013 study, 77.8% of delayed open access journals analyzed had an embargo of 12 months or less. 85.4% had an embargo period of 24 months or less. [1] [2] A journal subscription or an individual article purchase fee would be ...

  2. May 23, 2013 · Delayed open access (OA) refers to scholarly articles in subscription journals made available openly on the web directly through the publisher at the expiry of a set embargo period. Although a substantial number of journals have practiced delayed OA since they started publishing e-versions, empirical studies concerning OA have often overlooked ...

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  4. Launched. 2003. Current status. Online. The Directory of Open Access Journals ( DOAJ) is a website that hosts a community-curated list of open access journals, maintained by Infrastructure Services for Open Access (IS4OA). [1] It was launched in 2003 with 300 open access journals.

  5. Online archive. Proceedings of the National Academy of Sciences of the United States of America (often abbreviated PNAS or PNAS USA) is a peer-reviewed multidisciplinary scientific journal. It is the official journal of the National Academy of Sciences, published since 1915, and publishes original research, scientific reviews, commentaries, and ...

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  6. Jul 1, 2013 · Delayed open access (OA) refers to scholarly articles in subscription journals made available openly on the web directly through the publisher at the expiry of a set embargo period.

  7. A 2013 study looked at more than 110,000 articles from 492 journals with delayed open access and found the impact factor of articles in delayed open access journals was twice as high as traditional closed access journals (and, three times as high as gold open access journal). [1] [3] Delayed access does increase access to scholarly research ...

  8. Oct 13, 2016 · We find that a journal's academic status (impact factor) and accessibility (open access policy) both strongly increase the probability of it being referenced on Wikipedia. Controlling for field and impact factor, the odds that an open access journal is referenced on the English Wikipedia are 47% higher compared to paywall journals.

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